Damper for boilers



(No Model) W. S. PUOKETT.

Damper for. Boilers.

No. 235,572. Patented- Dec. I4; 1880.

N. PEIERS, PHOTO-LITHOGRAPHER. WASHINGTON. n. cl

UNITED STATES ATENT rrrcn.

WILLIAM S. PUOKETT, OF SUMTERVILLE, ALABAMA.

DAMPER FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 235,572, dated December 14, 1880.

Application filed October 19, 1880. (No model.)

To all whom it may concern Be it known that I, WILLIAM S. PUCKETT, of Sumterv ille, in the county of Sumter and State of Alabama, have invented certain new and useful Improvements in Dampers for Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in dampers for boilers; and it consists in placing in the ash-pit of the furnace a suitable guide upon each side, upon which guides the supports upon which the damper is pivoted move back and forth, whereby the damper can be drawn forward toward the front end of the furnace or moved backward to any desired distance for the purpose of regulating the draft under any desired portion of the fire, as will be more fully described hereinafter.

The object of my improvement is to make the damper adjustable back and forth in the furnace, so that the draft can be made to pass up through the fire at any desired point, and thus cause the fire to burn in any desired portion of the furnace, and thereby regulate the size of the fire according to the amount of heat that is desired.

Figure 1 is a longitudinal vertical section of my invention. Fig. 2 is a plan view of the same, the grate-bars being removed.

A represents the grate-bars, and B the ashpit, of the furnace. Secured to the inside of the furnace,along each side, is a guide, A over which is passed a sliding support, D, in between which supports, near their rear ends, is pivoted the damper F. This damper corresponds in shape to the shape ofv the ash-pit, so

.that when it hangs down it closes up the ash pit, so that no air can readily pass back of this damper so as to feed the fire on the grate-bars in its rear.

The front ends of the sliding supports are connected together by the cross-bar I, which forms a stop to prevent the damper from being drawn too far forward and thus shut out the draft entirely. When the damper is drawn forward until the stop or the end of the support strikes against the front end of the furnace there is but comparatively anarrow space left between the front edge of the damper and the front end of the furnace, so that all of the draft which passes up through the grate-bars will pass through the fire that is made upon the front end of the grate-bars only. When the damper is moved backward the draft then passes through all that portion of the fire which is in front of the damper, and this part of the fuel upon the grate-bars will burn briskly while the fuel in the rear of the damper will burn but slowly.

Where there is no special provision made for having the draft to pass up through that part of the fire that is made directly upon the front ends of the grate-bars, the fire will burn more briskly upon every other part of the grate-bars than at this one particular point, and hence by making the damper adjustable back and forth, as above described, the fire can be made to burn more briskly at the front end of the furnace than at any other point when so desired. The great advantage gained in making the damper adjustable in this manner is that where but a small fire is needed it can be kept burning briskly without the loss of any unnecessary fuel, which cannot well be done where the draft passes up through all parts of the grate-bars alike. By regulating the draft through the grate-bars and then reg- .ulating the size of the fire the heat can be regulated at will.

This invention is also applicable to stoves.

Having thus described my invention, I claim- In a furnace for steam-boilers, the combination of the two guides A placed upon opposite sides of the ash-pit, the two sliding supports D, secured together by the cross-piece I, and the damperF, pivoted between thetwo supports and provided with a handle for moving it back and forth, the supports D being adapted to act as stops for the damper at each end of the pit by projecting beyond it, substantially as shown.

In testimony that I claim the foregoing ,I have hereunto set my hand and seal thisfith day of October, 1880.

WILLIAM S. PUOKETT.

' Witnesses:

D. L. UNDERWOOD, I. 0. BROWN. 

